Jul 3 2013
Topics Covered
Introduction
Chemical Composition
Physical Properties
Mechanical Properties
Thermal Properties
Other Designations
Applications
Introduction
Nickel Alloy 90 is a wrought nickel-chromium-cobalt base alloy strengthened with the additions of aluminum and titanium. It has been developed as an age-hardenable creep-resisting alloy for service at temperatures up to 920°C (1688°F). The alloy has good resistance to high-temperature corrosion and oxidation.
The following section will discuss in detail about nickel alloy 90.
Chemical Composition
The chemical composition of nickel alloy 90 is outlined in the following table.
Element |
Content (%) |
Nickel, Ni |
55 |
Chromium, Cr |
18-21 |
Cobalt, Co |
15-21 |
Titanium, Ti |
2-3 |
Iron, Fe |
≤1.5 |
Aluminum, Al |
1-2 |
Manganese, Mn |
≤1 |
Silicon, Si |
≤1 |
Zirconium, Zr |
≤0.15 |
Carbon, C |
≤0.13 |
Boron, B |
≤0.02 |
Physical Properties
The following table shows the physical properties of nickel alloy 90.
Properties |
Metric |
Imperial |
Density |
8.18 g/cm3 |
0.296 lb/in3 |
Melting point |
1310-1370°C |
2390-2500°F |
Mechanical Properties
The mechanical properties of nickel alloy 90 are displayed in the following table.
Properties |
Metric |
Imperial |
Tensile strength (precipitation hardened) |
1150 MPa |
167000 psi |
Yield strength (precipitation hardened) |
725 MPa |
105000 psi |
Elongation at break (precipitation hardened) |
30% |
30% |
Thermal Properties
The thermal properties of nickel alloy 90 are given in the following table.
Properties |
Metric |
Imperial |
Thermal expansion co-efficient (@20-100°C/68-212°F) |
12.7 µm/m°C |
7.06 µin/in°F |
Thermal conductivity |
11.5 W/mK |
79.8 BTU.in/hrft².°F |
Other Designations
Other designations that are equivalent to nickel alloy 90 include the following:
-
BS 3075 (NA19)
-
BS HR202
-
BS HR402
-
BS HR501 - HR503
-
AMS 5829
-
AFNOR NCK 20 D
-
AECMA Pr EN 2295 – 2299
-
AECMA Pr EN 2400
-
AECMA Pr EN 2401
-
AECMA Pr EN 2412
-
AECMA Pr EN 2669
-
AECMA Pr EN 2670
Applications
The following are the list of applications of nickel alloy 90:
-
Blades and disks in gas turbines
-
Springs
-
Hot-working tools.